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Title

The architecture of Abell 1386 and its relationship to the Sloan Great Wall

Author(s)

Pimbblet, Kevin A.;  Andernach, Heinz;  Fishlock, Cherie K.;  Roseboom, Isaac G.;  Owers, Matthew S.

Abstract

We present new radial velocities from AAOmega on the Anglo-Australian Telescope for 307 galaxies (bJ < 19.5) in the region of the rich cluster Abell 1386. Consistent with other studies of galaxy clusters that constitute subunits of superstructures, we find that the velocity distribution of A1386 is very broad (21 000–42 000 km s−1, or z= 0.08& 8211;0.14) and complex. The mean redshift of the cluster that Abell designated as number 1386 is found to be ∼ 0.104. However, we find that it consists of various superpositions of line-of-sight components. We investigate the reality of each component by testing for substructure and searching for giant elliptical galaxies in each and show that A1386 is made up of at least four significant clusters or groups along the line of sight whose global parameters we detail. Peculiar velocities of brightest galaxies for each of the groups are computed and found to be different from previous works, largely due to the complexity of the sky area and the depth of analysis performed in the present work. We also analyse A1386 in the context of its parent superclusters: Leo A and especially the Sloan Great Wall. Although the new clusters may be moving towards mass concentrations in the Sloan Great Wall or beyond, many are most likely not yet physically bound to it.

Publication type

Journal article

Research centre

Swinburne University of Technology. Faculty of Information and Communication Technologies. Centre for Astrophysics and Supercomputing

Source

Monthly Notices of the Royal Astronomical Society, Vol. 410, no. 3 (Jan 2011), pp. 1837-1848

Publication year

2011

FOR Code(s)

0201 Astronomical and Space Sciences

Keyword(s)

Abell 1386;  Catalogues;  Cluster galaxies;  Dynamics;  Elliptical galaxies;  Kinematics;  Large-scale structure of Universe;  Lenticular galaxies;  Redshifts

Publisher

Wiley-Blackwell Publishing

ISSN

0035-8711

Publisher URL

http://dx.doi.org/10.1111/j.1365-2966.2010.17565.x

Copyright

Copyright © 2010 The Authors. Journal compilation copyright © 2010 Royal Astronomical Society. The accepted manuscript of the paper is reproduced here in accordance with the copyright policy of the publisher. The definitive publication is available at www.interscience.wiley.com.

Full text

Peer reviewed